lidR
: (A workshop for) Airborne LiDAR Data Manipulation and Visualization for Environmental Applications
Liam A.K. Irwin, Brent Murray
Overview
Light Detection and Ranging (lidar)
The lidR package - a brief introduction
Workshop overview
What is LiDAR?
Light Detection and Ranging
Active form of remote sensing
Measures distance to target surfaces with millions of narrow light pulses
Airborne laser scanning performs lidar systematically from aircraft or drones
LiDAR Data - Point Clouds
Discrete returns are aggregated as points in point clouds (LAS/LAZ)
These datasets contain geo-referenced points with three-dimensional (XYZ) coordinates, and other attributes; intensity, return number etc…
Point clouds can be processed into summaries of vegetation structure with lidR
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lidR
Package for
manipulating
and
visualizing
ALS data
Focused on forestry and ecological applications but broadly applicable beyond
Written entirely open source within R-geospatial ecosystem (terra/sf)
Runs efficiently with backend C++ code to perform processing
Workshop Outline
Introduction to Lidar and lidR (09:00)
Reading LAS and LAZ files (09:10)
Point Classification and filtering (9:15)
Digital Terrain Models and Height Normalization (9:25)
Canopy Height Models (9:35)
Lidar Summary Metrics (9:50)
File Collection Processing Engine (10:10)
Get Set Up!